{"reviews":[{"id":9016887,"locale":"en_US","rating":1,"title":"Needs redesign- difficult to draw water through","text":"I bought as a hydration reservoir for a Gregory pack. The fundamental flaw is the diameter of the tube is too narrow. This means that considerably more suction force is needed to draw fluid compared to a tube that is even slightly wider.\n\n  Let’s geek out here for a moment: Fluid through a tube is governed by Poiseuille’s law, which states that resistance varies as 1/r^4 (the full formula is more complex, but this is the portion that matters for us). This means that decreasing the diameter of a tube even a small amount results in a dramatic increase in resistance or suction force required in the case of a reservoir. In real world numbers, a 10% decrease in diameter results in 52% greater resistance, a 20% decrease in 144% greater resistance and a 50% decrease results in 16x greater resistance or 1500%!\n\nIf you look at the picture included comparing the narrowest points of the Gregory reservoir in blue and the competitor in white/clear you can see the difference in diameter. Trying to force water through a small opening is just not where i want to spend my energy when hiking.","textLength":1091,"csFlag":false,"inappropriateFlag":false,"reviewedFlag":false,"autoModerated":false,"published":true,"incentivized":false,"upVotes":0,"downVotes":0,"orderId":null,"dimensions":[],"responses":[],"tags":[],"media":{"photo":[],"video":[],"audio":[]},"user":{"nickName":null,"firstName":null,"lastName":null,"emailAddress":null,"externalId":null,"city":null,"state":null,"country":null,"ageRange":null,"badge":null,"shopperProfiles":[]},"reviewedDate":null,"purchaseDate":null,"dateCreated":"2026-08-16T00:00:00-04:00","customData":[],"acceptedTermsAndConditions":true,"incentiveType":null,"campaign":null,"deviceFingerprint":null,"topics":[],"syndication":{"sourceName":"gregorypacks.com","siteUrl":"https://www.gregorypacks.com/","logoUrl":"https://images.turnto.com/site/syndicationlogos/2099_LH48.png"},"catalogItems":[{"sku":"135276-145286-5583","title":"Gregory 3D Hydro 2L Reservoir","url":"https://www.scheels.com/p/135276-145286-5583","category":"pack-accessories","reviewCount":4,"ratingCount":4,"averageRating":1.8,"ratingBreakdown":{"1":3,"2":0,"3":0,"4":1,"5":0},"active":true,"attributes":[]}]},{"id":8657328,"locale":"en_US","rating":1,"title":"Do not recommend","text":"I have had two of these reservoirs develop leaks. The first one Gregory replaced but the second one they didn’t. It’s nice till it isn’t. The design is easy to fill but pressure from the cap eventually tears the bladder.","textLength":220,"csFlag":false,"inappropriateFlag":false,"reviewedFlag":false,"autoModerated":false,"published":true,"incentivized":false,"upVotes":0,"downVotes":0,"orderId":null,"dimensions":[],"responses":[],"tags":[],"media":{"photo":[],"video":[],"audio":[]},"user":{"nickName":null,"firstName":null,"lastName":null,"emailAddress":null,"externalId":null,"city":null,"state":null,"country":null,"ageRange":null,"badge":null,"shopperProfiles":[]},"reviewedDate":null,"purchaseDate":null,"dateCreated":"2026-07-09T00:00:00-04:00","customData":[],"acceptedTermsAndConditions":true,"incentiveType":null,"campaign":null,"deviceFingerprint":null,"topics":[],"syndication":{"sourceName":"gregorypacks.com","siteUrl":"https://www.gregorypacks.com/","logoUrl":"https://images.turnto.com/site/syndicationlogos/2099_LH48.png"},"catalogItems":[{"sku":"135276-145286-5583","title":"Gregory 3D Hydro 2L Reservoir","url":"https://www.scheels.com/p/135276-145286-5583","category":"pack-accessories","reviewCount":4,"ratingCount":4,"averageRating":1.8,"ratingBreakdown":{"1":3,"2":0,"3":0,"4":1,"5":0},"active":true,"attributes":[]}]},{"id":8142952,"locale":"en_US","rating":1,"title":"So confused by the positive reviews","text":"I don't see how all these reviews talk about a wide mouth opening when this reservoir has literally the smallest opening of any bladder I've owned (I've had the 2 majors and a few of the lesser known ones). Due to that super small opening it is such a pain to get ice in here or air it out to dry, hook or no hook. The tube is also so much longer than necessary and the magnetic piece only holds if there is absolutely no jostling involved. The build quality seems fine but the design is just terrible, so my experience has been very different than the rest of these highly rated reviews. The only reason I have Gregory bladders is because I've bought their packs (which I like!) and the reservoirs are compatible, but I'm ready to just let a better designed bladder slouch in the bottom of the packs due to the Gregory version being so bad.","textLength":841,"csFlag":false,"inappropriateFlag":false,"reviewedFlag":false,"autoModerated":false,"published":true,"incentivized":false,"upVotes":0,"downVotes":0,"orderId":null,"dimensions":[],"responses":[],"tags":[],"media":{"photo":[],"video":[],"audio":[]},"user":{"nickName":null,"firstName":null,"lastName":null,"emailAddress":null,"externalId":null,"city":null,"state":null,"country":null,"ageRange":null,"badge":null,"shopperProfiles":[]},"reviewedDate":null,"purchaseDate":null,"dateCreated":"2026-03-22T00:00:00-04:00","customData":[],"acceptedTermsAndConditions":true,"incentiveType":null,"campaign":null,"deviceFingerprint":null,"topics":[],"syndication":{"sourceName":"gregorypacks.com","siteUrl":"https://www.gregorypacks.com/","logoUrl":"https://images.turnto.com/site/syndicationlogos/2099_LH48.png"},"catalogItems":[{"sku":"135276-145286-5583","title":"Gregory 3D Hydro 2L Reservoir","url":"https://www.scheels.com/p/135276-145286-5583","category":"pack-accessories","reviewCount":4,"ratingCount":4,"averageRating":1.8,"ratingBreakdown":{"1":3,"2":0,"3":0,"4":1,"5":0},"active":true,"attributes":[]}]},{"id":7829190,"locale":"en_US","rating":4,"title":"pretty good","text":"the mouth piece did not have a slit in it so it was unusable at first and i had to cut the slit into it myself which was unfortunate. otherwise it is a good product.","textLength":165,"csFlag":false,"inappropriateFlag":false,"reviewedFlag":false,"autoModerated":false,"published":true,"incentivized":false,"upVotes":0,"downVotes":0,"orderId":null,"dimensions":[],"responses":[],"tags":[],"media":{"photo":[],"video":[],"audio":[]},"user":{"nickName":null,"firstName":null,"lastName":null,"emailAddress":null,"externalId":null,"city":null,"state":null,"country":null,"ageRange":null,"badge":null,"shopperProfiles":[]},"reviewedDate":null,"purchaseDate":null,"dateCreated":"2025-04-26T00:00:00-04:00","customData":[],"acceptedTermsAndConditions":true,"incentiveType":null,"campaign":null,"deviceFingerprint":null,"topics":[],"syndication":{"sourceName":"gregorypacks.com","siteUrl":"https://www.gregorypacks.com/","logoUrl":"https://images.turnto.com/site/syndicationlogos/2099_LH48.png"},"catalogItems":[{"sku":"135276-145286-5583","title":"Gregory 3D Hydro 2L Reservoir","url":"https://www.scheels.com/p/135276-145286-5583","category":"pack-accessories","reviewCount":4,"ratingCount":4,"averageRating":1.8,"ratingBreakdown":{"1":3,"2":0,"3":0,"4":1,"5":0},"active":true,"attributes":[]}]}],"offset":0,"limit":10,"total":4,"gtin":"190207090055"}