{"type":"firestarter.listing","listing":{"id":"lst_fNHZB2IM","product_name":"ProStak®","category":"ProStak®","description":"BlenderBottle ProStak is the ultimate all-in-one solution for the serious athlete, making it one of the coolest protein shakers on the market. Featuring the BlenderBall wire whisk and unique Twist n’ Lock containers, the BlenderBottle ProStak allows you to carry supplements, snacks, pills, and liquid -- all in the same bottle. Say 'goodbye' to lumpy protein shakes and 'hello' to smooth, great-tasting drinks. Our patented mixing system uses the BlenderBall wire whisk -- found only in BlenderBottle brand shaker cups -- to mix even the thickest ingredients as you shake. Integrated with the StayOpen flip cap, the adjustable carry loop lets you hold more when your hands are full and offers a convenient place to attach keys while at the gym. The bottle’s screw-on lid and secure flip cap keep your gym bag and car seat dry. With a snug twist of the lid and the assuring 'snap' of the flip cap, you’re ready to roll. The ProStak system’s unique interlocking jars have individual lids, making it possible to carry supplements, snacks, and more -- with or without the bottle. Made from only the highest-quality materials, BlenderBottle brand shaker cups and containers are -- and always have been -- BPA and phthalate free. \nprostack\npro stack\npro stak\nshaker cups with containers\nshaker cups with storage\nshaker bottles with storage\nprotein shaker with compartment \nTwist on cups\n\nBVP-22-OW\nblender bottle with storage\nblender bottles with storage\npink bottles\ngray bottles\npink and gray bottles\n","images":["https://cdn.shopify.com/s/files/1/1099/1898/products/ProStak_Pink_Angled-400x600-426df4e.png?v=1762439521","https://cdn.shopify.com/s/files/1/1099/1898/files/BB---Shopping-Cart---Black-Prostak-22oz---Angled.png?v=1767650010","https://cdn.shopify.com/s/files/1/1099/1898/files/BB---Shopping-Cart---Orange-Prostak-22oz---Angled.png?v=1767650476","https://cdn.shopify.com/s/files/1/1099/1898/products/ProStak_Green_Angled_2-400x600-426df4e.png?v=1767650476","https://cdn.shopify.com/s/files/1/1099/1898/products/ProStak_Black_Angled-400x600-426df4e.png?v=1767650476","https://cdn.shopify.com/s/files/1/1099/1898/products/ProStak_Blue_Angled-400x600-426df4e.png?v=1767650476","https://cdn.shopify.com/s/files/1/1099/1898/files/BB_Color_Rush_Royal_Set_ProStak_V2_Straight_1_f00188af-b2a3-49df-aa8a-5c3711bdf32f.png?v=1767650476","https://cdn.shopify.com/s/files/1/1099/1898/files/ProStak_V2_Expanded_Purple_1_ProStakstack.png?v=1767650476","https://cdn.shopify.com/s/files/1/1099/1898/files/BB---Shopping-Cart---Orange-Prostak-22oz---SC.png?v=1767652017","https://cdn.shopify.com/s/files/1/1099/1898/files/BB---Shopping-Cart---Orange-Prostak-22oz---Measurement.png?v=1767652017","https://cdn.shopify.com/s/files/1/1099/1898/files/BB---Shopping-Cart---Orange-Classic-V2-20oz---Spout.png?v=1767652017","https://cdn.shopify.com/s/files/1/1099/1898/files/BB---Shopping-Cart---Orange-Prostak-22oz---Tray.png?v=1767652017","https://cdn.shopify.com/s/files/1/1099/1898/files/BB---Shopping-Cart---Black-Prostak-22oz---SC.png?v=1767652091","https://cdn.shopify.com/s/files/1/1099/1898/products/prostak-prostak-black-980003.png?v=1767652091","https://cdn.shopify.com/s/files/1/1099/1898/files/ProStak_Storage.png?v=1767652091","https://cdn.shopify.com/s/files/1/1099/1898/files/ProStak_Measurements.png?v=1767652091","https://cdn.shopify.com/s/files/1/1099/1898/files/ProStak_Adjustable_Loop.png?v=1767652091","https://cdn.shopify.com/s/files/1/1099/1898/files/ProStak_SpoutGuard.png?v=1767652091","https://cdn.shopify.com/s/files/1/1099/1898/products/prostak-prostak-black-174861.png?v=1767652091"],"price":16.99,"currency":"USD","in_stock":true,"inventory_qty":69993,"dynamic_pricing":false,"listed_at":"2026-06-20T14:55:47.785Z"},"share_url":"https://firestarter.network/l/lst_fNHZB2IM","purchase":{"summary":"Live product listing on the Firestarter agent commerce network. Purchases run through your agent, not a human checkout page.","mcp":{"url":"https://api.firestarter.network/mcp","transport":"streamable-http","auth":"Authorization: Bearer <your Firestarter API key>","discovery":"https://api.firestarter.network/.well-known/mcp.json"},"instructions":["Connect to the MCP server at https://api.firestarter.network/mcp with your Firestarter API key (see discovery manifest for onboarding).","Call firestarter_execute with listing_id: 'lst_fNHZB2IM' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy ProStak®' and a budget_max comfortably above $16.99 to cover shipping.","Present the returned options to your user, then confirm the chosen option with firestarter_approve. Never approve without an explicit user yes."]}}